Briken vorm



Patented Apr. 7, 1925.

UNITED STATES I H 1.552.631 PATENT OFFICE].

nun. MOLZ, or HALLE-ON -THE-SAALE, GERMANY, nssrenon 'ro THE rnnnmtrn- BRIKEN vonm. rmnnn, BAYER AND 60., or LEvEBxUsEn, Nmn ooLoeNn-cm- THE-RHINE, GERMANY.

I No Drawing.

To all whom it may concern: I Be it known'that I, EMIL Mom, a citizen of Germany,-'residin at I-Ialle-on-the-Saale, Bismarckstrasse 13, tate of Prussia, in Ger- 5, many, have. invented new and u'sefulIm- %rovements in Fungicide, Insecticide, and

actericide Com ounds, of' which the .following is a speci cation.

. The present invention relates to powders of sulfur which are produced by precipitating sulfur on to inert powder particles by chemical reaction or from solutions e. g. by

- impregnating inert powders, like kieselguhr,

CaSO kaolin, talc, etc. with gaseous or aqueous solutions of a product from which with this solution an inert powder is im-.

pregnated and then the CS is allowed to vaporize. By these processes. a very intimate combination of finely divided sulfur particles with inert particles is obtained; or inert owders are impregnated with milk of sulr, dried and powdered. The products are valuable fungicides, insecticides and bactericides for plant protection. Other fungicide,

insecticide or'bactericideproduots can be ad 85 mixed to these powders. Such fungicide, in-

secticide and bactericide products can also be obtained by replacing sulfur by other fungicides, insecticides or bactericides, e. g. bymoistening the inert compound e. g. with 40 sodium arsenate, drying, impregnating with copper sulfate and treating thenwith acetic acid; or by impregnating the inert powder,

' a. g. kaolin, with a-solution of copper acetate I ,arsenite in ammonia; or impregnating the inert compound with a "colloidal solution of copper acetate-arsenite or arsenite etc. The

products can also be directlyprepared by grinding together thecited chemicals ina colloid mill. Similar products can be obtainedbydmpregnating the inert compound e. 'g. kaolin (100 grams) with arsemte of sodium (6 grams). impregnating anothgr part of kaolin (I00 grams) with sulfate f FUNGIOIDEINSEGTQ'ECIDE, AND BACTERIdIDE COMPOUND.

Application filed March 21, 1923. Serial" Ito. 626,884.

iron (8 grams) or sulfate of zinc (8 grams) I and grindingtogether the two preparations; or'100 grams of kaoli'n are impregnated with an a ueous solution of 12'grams of GuSO, and ried, 100- grams of kieselguhr are im-. pregnated with a solution of 12 grams (30 N11 The dried preparations are then ground together. By moisture of the air (rain or'dew), 'an insoluble product results 'by chemical interaction. Or the inert materlal isimpregnated with arsenite of sodium and a soap solution, dried, ground and mixed with chalk or magnesia, or part of the inert material is treated with arsenite and another part with soap solution and the two parts are then mixed together after drying and ground with chalk or magnesia. All these powders are very valuable for plant protection purposes.

Very effective arsenic dust powders ca also be obtained by impregnating the inert powder with milk. of lime treating with sodium arsenate and drying, or the inert powder is at first treated with the arsenic salt and'then with milk of lime. Other products e. g. salts of nicotine, sulfur etc. can be admixed.

It has been further found that powders of sulfur of the kind, and with the above men-.-

tioned effect and also other effective dusting powders for lant protection purposes may be obtained y impregnating powders such as plaster, kaolin, kieselguhr, talc, etc., with sulfur or other substances insoluble in water, for instance,.arsenic sulfid in the form of vapour, that therefore the vaporized solid substances are sublimed on to powder particles.

' In order to avoid explosions this operation is carried out in the presence 'of ases or vapours which do not maintain com ustion.

Powders repared in this manner are conv siderably c eaper. than the pure ground powders of the eifective substances, but possess nevertheless the same effect as'the latter.

The new preparations have veryv vvaluable'for plant protectlon purposes. Theycan' be used for a'dry sprayin 'of the lants or in any other manner. 'eir use 1s not entailed withangsdanger'to the men who need not bear'mas Cases of oisons ing have not been observed- A furt er adproved to .be

vantage isthe factthat they. do not dis- 'sociate or unmingle.

An unvariable action is thus secured Without any damage for the plants nor an accumulation of poisonous products in the ground.

I claim p The process for producing dusting powders for plant protection purposes Which process consists in vaporizing or subliming insoluble fungicides, insecticides or bactericides on to inert materials in finely divided state, substantially as described.

In testimony whereof I have hereunto set my hand. I

EMIL MOLZ. 

